POSS Test Pass Rate: Why Nobody Publishes One

Search for a POSS pass rate and you will find numbers. Treat all of them with suspicion, because no utility and no test publisher puts one in writing.

This page explains why the figure does not exist, what does exist, and what to do with the absence.

There is no single pass mark to have a rate against

The Plant Operator Selection System does not have a national passing score. Cut scores are set by each employer against its own hiring needs, which means "the pass rate" would be a different number at every utility using the battery — and would change whenever an employer adjusted its threshold or its applicant pool shifted.

EEI's position, reflected in the brochures utilities publish themselves, is that cutoff scores are tailored to local company employment needs. That is the whole reason a universal pass rate is not a meaningful quantity, let alone a published one.

Employers do not tell you the threshold either

Some are explicit that they will not. Southern California Edison's testing FAQ answers the question directly — "Can you tell me the cutoff score?" — with: "Unfortunately, we do not provide cut off scores; we only provide pass or fail results."

Others tell you the outcome on the day without the number behind it. Arkansas Electric Cooperative Corporation publishes that where a test is taken on site, "test results will be available immediately following testing. Your testing administrator will notify you if you met the cut-off score of the testing and, in turn, are recommended for an interview." You learn whether you cleared their bar; you do not learn what it was.

This is also why we do not publish a pass mark anywhere on this site. Any specific "score you need" figure for an EEI battery is either someone's guess or a number lifted from EEI's practice material, which describes the practice version rather than the real test.

What is published: the scale, not the bar

Score scales are public, and they are worth knowing so you can read your result if you are given one. POSS reports on an index scale, as do the other batteries — CAST and POSS use different ranges. Our guide to EEI scoring sets out what each battery reports and what the index does and does not tell you.

What an index score cannot tell you is where you sit relative to the people you are competing with, because the employer's threshold and applicant pool are both undisclosed.

What you can find out

• Which battery you are sitting. The job posting's minimum qualifications state it, and the invitation usually repeats it. POSS and MASS are sometimes combined — AECC lists a "Power Plant Maintenance/Power Operator Selection System (POSS/MASS)" as a distinct option.
• The sections and their timings. These come from the EEI brochure your employer publishes or gives you access to. Our POSS guide collects what the brochures state.
• Whether you cleared it. Often immediately, if you test on site.
• The retake rules. These are published by some employers. AECC states "a minimum of 15 days must pass between the first and second attempts to qualify on the same EEI test" and that applicants "may not take the same test more than twice (2 times) in a twelve (12) month time frame." Other utilities differ — see our retake guide.

Why people want the number, and what to use instead

The pass rate question is usually really a question about difficulty: how worried should I be? That is answerable without a statistic.

POSS is a timed battery covering reading comprehension, mechanical concepts, mathematical usage and figural reasoning. The difficulty is not the content — it is the pace, and the unfamiliarity of the item formats if you have not seen them before. People who run out of time do so because they are still working out what a question is asking on their first encounter with the format.

That is a fixable problem, and it is the only part of this you control. Each POSS section has a free demo here: Reading Comprehension, Mechanical Concepts, Mathematical Usage and Figural Reasoning. Timed full-length practice is on the pricing page.

If you do not clear it

AECC's process is typical of how this works in practice: a candidate who does not meet the cut-off is not recommended for interview and "must reapply to a new position and receive an invitation to test to be considered for future opportunities." The result is tied to the application, so you are not permanently excluded — but you wait for the retake window and a new vacancy.

Results can sometimes transfer between employers instead, which is worth checking before retesting. Our score transfer guide covers the release-form process utilities use.

Frequently asked questions

What is the pass rate for the POSS test?

No utility or test publisher publishes one. Cut scores are set locally by each employer, so there is no single threshold for a pass rate to be measured against.

What score do I need to pass the POSS?

Not published. Employers set and do not disclose their own cut-offs; some, such as Southern California Edison, state explicitly that they give pass or fail results only.

Will I be told my POSS score?

Sometimes only whether you qualified. Where the test is taken on site, some utilities give the outcome immediately.

Is the POSS hard?

The constraint is pace and format familiarity rather than the difficulty of the underlying material. Its sections are timed.

Can I retake the POSS if I fail?

Under the employer's policy, and usually tied to a new application. AECC publishes 15 days between attempts and a maximum of two attempts on the same test in twelve months.

Why do some sites quote a pass rate anyway?

Because it is a popular search. Any figure you see is not sourced to a utility or to EEI, because neither publishes one.